Development of Low Charge-to-Mass Ratio Post-Accelerator for the RIA Project

Ostroumov, P.N.
August 2003
AIP Conference Proceedings;2003, Vol. 680 Issue 1, p1003
Conference Proceeding
A post-accelerator for rare isotopes (RIB linac) which must produce high-quality beams of radioactive ions over the full mass range, including uranium, at energies above the coulomb barrier is being developed for the U.S. RIA facility. To provide highest possible intensity of rare isotopes with masses from 6 to 240, the linac will accept all ions in the 1+ charge state. A high resolution separator for purifying beams at the isobaric level precedes the RIB linac. Charge stripping in the linac takes place at two stages: helium gas stripping at energies of a few tens of keV/u, and an additional foil stripping at ∼680–1700 keV/u for the heavier ions. The RIB linac will utilize existing superconducting heavy-ion linac technology for all but one exceptional piece, a very-low-charge-state injector, which is needed for the first ∼9 MV of the accelerator. This section consists of a pre-buncher followed by three sections of cw, normally-conducting RFQ. The first section is a conventional RFQ operating at 12 MHz. The following two sections are hybrid RFQs operating at 12 and 24 MHz. A 1:2 scale cold model of 12 MHz RFQ was built and it is being studied in order to determine final specifications for the full power 12 MHz hybrid RFQ. This paper reports on the present status of the RIB linac development with particular attention paid to the very-low-charge-state injector section. © 2003 American Institute of Physics


Related Articles

  • Acceleration of light ions from a laser source in a four vane radio frequency quadrupole. Collier, J.; Haseroth, H.; Kuttenberger, A.; Langbein, K. // Review of Scientific Instruments;Mar96, Vol. 67 Issue 3, p1089 

    Discusses the acceleration of light ions from a laser source in a four vane radio frequency quadrupole (RFQ). Advantages and technical problems; Injection energy requirement; Measured output current at the exit of the RFQ; Variation of the energy of the ions arriving at the RFQ entrance.

  • Acceleration of high-current ion beams. Spadtke, P.; Emig, H.; Klabunde, J.; Mayr, R.; Ruck, D.M.; Tinschert, K. // Review of Scientific Instruments;Mar96, Vol. 67 Issue 3, p1146 

    Discusses the acceleration of high-current ion beams. Space charge compensation of the measured emittances of ion beams; Simulation of the influence of the space charge on the beam quality; Input energy of the radio frequency quadrupole.

  • The Tandem-RFQ Linac Booster at Sandia National Laboratories. McDaniel, F.D.; Doyle, B.L.; Rossi, P.; Buller, D.L.; Hamm, R.W.; Schone, H. // AIP Conference Proceedings;2003, Vol. 680 Issue 1, p986 

    A booster linac based on the Radio Frequency Quadrupole (RFQ linac) has been put into routine operation on the 6.5 MV EN tandem accelerator at the Sandia National Laboratories (SNL) Ion Beam Materials Research Lab (IBMRL) for Radiation Effects Microscopy (REM) experiments with high energy, heavy...

  • An Rf Focused Interdigital Ion Accelerating Structure. Swenson, D.A. // AIP Conference Proceedings;2003, Vol. 680 Issue 1, p1013 

    An Rf Focused Interdigital (RFI) ion accelerating structure will be described. It represents an effective combination of the Wideröe (or interdigital) linac structure, used for many low frequency, heavy ion applications, and the rf electric quadrupole focusing used in the RFQ and RFD linac...

  • New Development in High Power RFQ Accelerators. Schempp, A. // AIP Conference Proceedings;2003, Vol. 680 Issue 1, p1008 

    RFQs are the standard solution for new ion injectors for light and heavy ions. A survey on work on high duty factor high current RFQs will be given to illustrate the various solutions and the special problems in that field, which covers e.g. RFQs as spallation source injectors, neutron...

  • Segmented linear radiofrequency quadrupole/laser ion source project at TRIUMF. Lavoie, J. P.; Bricault, P.; Lassen, J.; Pearson, M. R. // Hyperfine Interactions;Dec2006, Vol. 174 Issue 1-3, p33 

    Reactions such as 25Al(p, γ)26Si are the key to understand the production of 26 g Al and 26 m Al in our galaxy. Experimental results could provide important constraints on nova nucleosynthesis and modelling where 26Al is believed to be produced. To achieve such measurements, high-intensity...

  • Population and coherence transfer in half-integer quadrupolar spin systems induced by simultaneous rapid passages of the satellite transitions: A static and spinning single crystal nuclear magnetic resonance study. Scha¨fer, Hartmut; Iuga, Dinu; Verhagen, Rieko; Kentgens, Arno P. M. // Journal of Chemical Physics;2/15/2001, Vol. 114 Issue 7 

    We have recently shown that utilizing double frequency sweeps (DFSs) instead of pulses can lead to increased efficiencies in population and coherence transfer in half-integer quadrupolar spin systems. Cosine modulation of the carrier amplitude corresponds to the simultaneous irradiation of two...

  • Radio-frequency-mediated dipolar recoupling among half-integer quadrupolar spins. Baldus, Marc; Rovnyak, David; Griffin, Robert G. // Journal of Chemical Physics;4/1/2000, Vol. 112 Issue 13 

    It is demonstrated that through-space recoupling can be achieved in dipolar coupled quadrupolar spins in the presence of an appropriate radio-frequency field. Experimental and theoretical results for [sup 23]Na-[sup 23]Na pairs are presented that elucidate the experimental conditions leading to...

  • Laser-cooling of ions and ion acceleration in the RF-Quadrupole ring trap PALLAS. Schramm, U.; Scha¨tz, T.; Habs, D. // AIP Conference Proceedings;2001, Vol. 576 Issue 1, p667 

    We report on the commissioning of the table-top RF-Quadrupole storage ring PALLAS*, dedicated to the experimental realization of crystalline ion beams. Images of large prolate [sup 24]Mg[sup +]-ion crystals are presented, operating PALLAS locally as a linear rf-trap and applying laser-cooling,...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics